Wednesday, February 27, 2013

Expansion & Contraction (thermal shock)




Expansion & Contraction (thermal shock)


Roofs expand and contract every day. The sun’s heat makes the roof stretch out in the day. At night, the evening cools the roof causing it to contract. This is referred to as thermal shock. Flashings and drains are typically metal penetrations that go through the roof. They expand and cool much quicker than the roof membrane. Over time, the tremendous strain from the thermal shock causes metal drains and flashings to pull away from the roof assembly at these critical areas. The movement also causes the roof to split.


3 comments:

  1. Thanks for providing recent updates regarding the concern, I look forward to read more.
    Roofing Contractor

    ReplyDelete
  2. Thanks for your insight for your fantastic posting. I’m glad I have taken the time to see this.
    Roofing Company

    ReplyDelete
  3. This is because there are a lot of scam artists out there there. Fortunately, there are a number of big ways to find someone reliable for building your homes roof. Brentwood Metal Roofing

    ReplyDelete